US20070080902A1 - Plasma display device and driving method thereof - Google Patents

Plasma display device and driving method thereof Download PDF

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Publication number
US20070080902A1
US20070080902A1 US11/525,774 US52577406A US2007080902A1 US 20070080902 A1 US20070080902 A1 US 20070080902A1 US 52577406 A US52577406 A US 52577406A US 2007080902 A1 US2007080902 A1 US 2007080902A1
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period
voltage
electrodes
group
sustain
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Joon-Yeon Kim
Hak-cheol Yang
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Samsung SDI Co Ltd
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Samsung SDI Co Ltd
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Assigned to SAMSUNG SDI CO., LTD. reassignment SAMSUNG SDI CO., LTD. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: KIM, JOON-YEON, YANG, HAK-CHEOL
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    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
    • G09G3/28—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using luminous gas-discharge panels, e.g. plasma panels
    • G09G3/288—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using luminous gas-discharge panels, e.g. plasma panels using AC panels
    • G09G3/291—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using luminous gas-discharge panels, e.g. plasma panels using AC panels controlling the gas discharge to control a cell condition, e.g. by means of specific pulse shapes
    • G09G3/294—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using luminous gas-discharge panels, e.g. plasma panels using AC panels controlling the gas discharge to control a cell condition, e.g. by means of specific pulse shapes for lighting or sustain discharge
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
    • G09G3/28—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using luminous gas-discharge panels, e.g. plasma panels
    • G09G3/288—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using luminous gas-discharge panels, e.g. plasma panels using AC panels
    • G09G3/298—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using luminous gas-discharge panels, e.g. plasma panels using AC panels using surface discharge panels
    • G09G3/299—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using luminous gas-discharge panels, e.g. plasma panels using AC panels using surface discharge panels using alternate lighting of surface-type panels
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
    • G09G3/28—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using luminous gas-discharge panels, e.g. plasma panels
    • G09G3/288—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using luminous gas-discharge panels, e.g. plasma panels using AC panels
    • G09G3/291—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using luminous gas-discharge panels, e.g. plasma panels using AC panels controlling the gas discharge to control a cell condition, e.g. by means of specific pulse shapes
    • G09G3/293—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using luminous gas-discharge panels, e.g. plasma panels using AC panels controlling the gas discharge to control a cell condition, e.g. by means of specific pulse shapes for address discharge
    • G09G3/2932—Addressed by writing selected cells that are in an OFF state
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
    • G09G3/28—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using luminous gas-discharge panels, e.g. plasma panels
    • G09G3/288—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using luminous gas-discharge panels, e.g. plasma panels using AC panels
    • G09G3/296—Driving circuits for producing the waveforms applied to the driving electrodes
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J11/00—Gas-filled discharge tubes with alternating current induction of the discharge, e.g. alternating current plasma display panels [AC-PDP]; Gas-filled discharge tubes without any main electrode inside the vessel; Gas-filled discharge tubes with at least one main electrode outside the vessel
    • H01J11/20—Constructional details
    • H01J11/22—Electrodes, e.g. special shape, material or configuration
    • H01J11/24—Sustain electrodes or scan electrodes
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2310/00—Command of the display device
    • G09G2310/06—Details of flat display driving waveforms
    • G09G2310/066—Waveforms comprising a gently increasing or decreasing portion, e.g. ramp
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00—Control of display operating conditions
    • G09G2320/02—Improving the quality of display appearance
    • G09G2320/0228—Increasing the driving margin in plasma displays

Definitions

  • the present invention relates to a plasma display device and a driving method thereof.
  • a plasma display device is a flat panel display that uses plasma generated by a gas discharge to display characters or images. It includes a plurality of discharge cells arranged in a matrix pattern.
  • One frame of the plasma display device is divided into a plurality of subfields each having a brightness weight, and each subfield includes a reset period, an address period, and a sustain period.
  • a discharge cell to be turned on hereinafter, referred to as a “turn-on cell”
  • a discharge cell to be turned off hereinafter, referred to as a “turn-off cell” are selected during an address period of each subfield.
  • the turn-on cell is sustain-discharged during a sustain period so as to display an image.
  • a plurality of display lines are respectively scanned so as to select turn-on cells. Therefore, scan circuits corresponding to the number of display lines are required to sequentially scan the plurality of display lines, which increases a cost of the plasma display device.
  • One aspect of the present invention provides a plasma display device for reducing the number of scan circuits and a method of driving the plasma display device.
  • Another aspect of the invention provides a method of driving a plasma display device, wherein the plasma display device is driven by a plurality of subfields divided from a frame, and the plasma display device includes a plurality of scan lines respectively having a plurality of first display lines and a plurality of second display lines, a plurality of address lines crossing the plurality of scan lines, a plurality of first discharge cells respectively formed by the plurality of first display lines and the plurality of address lines, and a plurality of second discharge cells respectively formed by the plurality of second display lines and the plurality of address lines.
  • a first light emitting cell is selected from among the plurality of first discharge cells during a first period of an address period
  • a second light emitting cell is selected from among the plurality of second discharge cells during a second period of the address period
  • the first light emitting cell is sustain-discharged during a third period between the first and second periods of the address period to compensate wall charges of the plurality of second discharge cells.
  • a plasma display device which includes a plasma display panel (PDP) and a driver.
  • the PDP includes a plurality of scan lines respectively having first display lines and second display lines, a plurality of address lines crossing the plurality of scan lines, and a plurality of discharge cells respectively formed by the first and second display lines and the plurality of address lines.
  • the driver selects a turn-on discharge cell from the first display line during a first period of an address period, selects the turn-on discharge cell from the second display line during a second period of the address period, sustain-discharges the turn-on discharge cell of the first display line during a third period between the first period and the second period, and compensates wall charges of the turn-on discharge cell of the second display line.
  • Still another aspect of the invention provides a plasma display device, comprising: a plurality of scan lines, a plurality of address electrodes crossing the scan lines, a plurality of first discharge cells defined by a plurality of first display regions and the address electrodes, a plurality of second discharge cells defined by a plurality of second display regions and the address electrodes, wherein two adjacent first and second display regions share one of the scan lines.
  • the driver is configured to: i) sequentially apply a first scan pulse to the scan lines so as to select a first turn-on cell from the first discharge cells during a first period of an address period, ii) sequentially apply a second scan pulse to the scan lines so as to select a second turn-on cell from the second discharge cells during a second period of the address period, iii) apply a first voltage to the scan lines during a third period between the first and second periods so as to sustain-discharge one of the first and second turn-on cells, and iv) alternatively apply a second voltage and a third voltage to the scan lines so as to sustain-discharge the first and second turn-on cells during a sustain period, wherein the second voltage is lower than the first voltage and the third voltage is lower than the second voltage.
  • FIG. 1 shows a schematic diagram of a plasma display device according to an exemplary embodiment of the present invention.
  • FIG. 2 shows a diagram representing one exemplary embodiment of an electrode arrangement of the PDP shown in FIG. 1 .
  • FIG. 3A to FIG. 3C respectively show diagrams representing driving waveforms of the plasma display device according to one exemplary embodiment of the present invention.
  • FIG. 4A to FIG. 4C respectively show a diagram representing discharge cell states at two adjacent display lines.
  • FIG. 5A to FIG. 5F respectively show diagrams representing wall charge states on a discharge cell in respective periods of FIG. 3A to FIG. 3C .
  • FIG. 6 shows a diagram representing another exemplary embodiment of an electrode arrangement of the PDP shown in FIG. 1 .
  • wall charges mentioned in the following description mean charges formed and accumulated on a wall (e.g., a dielectric layer) close to an electrode of a discharge cell.
  • a wall charge will be described as being “formed” or “accumulated” on the electrode, although the wall charges do not actually touch the electrodes.
  • a wall voltage means a potential difference formed on the wall of the discharge cell by the wall charge.
  • a plasma display device according to an exemplary embodiment of the present invention will be described with reference to FIG. 1 and FIG. 2 .
  • FIG. 1 shows a schematic diagram of the plasma display device according to the exemplary embodiment of the present invention.
  • the plasma display device includes a plasma display panel (PDP) 100 , a controller 200 , an address electrode driver 300 , a scan electrode driver 400 , and a sustain electrode driver 500 .
  • PDP plasma display panel
  • the PDP 100 includes a plurality of address (A) electrodes A 1 to A m , extending in a column direction, a plurality of sustain (X) electrodes X 1 to X n extending in a row direction, and a plurality of scan (Y) electrodes Y 1 to Y n also extending in the row direction.
  • A address
  • X sustain
  • Y scan
  • the controller 200 receives an external video signal and outputs an A electrode driving control signal, an X electrode driving control signal, and a Y electrode driving control signal. In addition, the controller 200 divides a frame into a plurality of subfields respectively having a weight. Further, the controller 200 controls the sustain electrode driver 500 to drive a first group including odd-numbered X electrodes and a second group including even-numbered X electrodes separately. In another embodiment, the first group may include even-numbered X electrodes, and the second group may include odd-numbered X electrodes.
  • the address electrode driver 300 receives the A electrode driving control signal from the controller 200 and applies a driving voltage to the A electrodes A 1 to A m .
  • the scan electrode driver 400 receives the Y electrode driving control signal from the controller 200 and applies a driving voltage to the Y electrodes Y 1 to Y n .
  • the sustain electrode driver 500 receives the X electrode driving control signal from controller 200 and applies a driving voltage to the X electrodes X 1 to X n .
  • FIG. 2 shows a diagram representing one exemplary embodiment of an electrode arrangement of the PDP shown in FIG. 1 .
  • the A electrodes A 1 to A m may be formed on a substrate (e.g., a rear substrate), and the X electrodes X 1 to X n and the Y electrodes Y 1 to Y n may be formed on another substrate (e.g., a front substrate) such that the two substrates face to each other.
  • the respective X electrodes X 1 to X n are alternately formed with respect to the Y electrodes Y 1 to Y n
  • the Y electrodes Y 1 to Y n define scan lines to which a scan pulse having a scan voltage (see VscL in FIG. 3A to FIG.
  • each of display lines (display regions) L 1 to L (2n ⁇ 1) for displaying an image is defined between a corresponding one of the Y electrodes Y 1 to Y n and a corresponding one of the X electrodes X 1 to X 1 .
  • the display lines L 1 to L (2n ⁇ 1) include a plurality of first display lines and a plurality of second display lines.
  • Each of the first display lines is defined by a corresponding one of the first group including the odd-numbered X electrodes X 1 , X 3 , . . . , and X (n ⁇ 1) and a corresponding one of the Y electrodes Y 1 to Y 1 .
  • Each of the second display lines is defined by a corresponding one of the second X electrode group including the even-numbered X electrodes X 2 , X 4 , . . . , and X n and a corresponding one of the Y electrodes Y 1 to Y n . Therefore, one X electrode may define two display lines, which are respectively located at the upper side and the lower side of the X electrode, together with two adjacent Y electrodes.
  • One Y electrode also may define two display lines, which are respectively located at the upper side and the lower side of the Y electrode, together with two adjacent X electrodes.
  • discharge spaces at crossing regions of the display lines L 1 to L (2n ⁇ 1) and the A electrodes A 1 to A m respectively define discharge cells 23 , and the discharge cells 23 are partitioned in the row direction by barrier ribs 24 .
  • the barrier ribs 24 extends in the column direction and are formed between two adjacent A electrodes.
  • Each of the X electrodes X 1 to X n includes a bus electrode 21 a and a transparent electrode 21 b
  • each of the Y electrodes Y 1 to Y 1 also includes a bus electrode 22 a and a transparent electrode 22 b .
  • the transparent electrodes 21 b and 22 b are respectively coupled to the bus electrodes 21 a and 22 a .
  • the width along the column direction of the transparent electrode 21 b or 22 b may be wider than that of the bus electrode 21 a or 22 a .
  • the transparent electrode 21 b or 22 b may be formed by non-transparent materials.
  • the discharge cells 23 may be partitioned in a column direction by barrier ribs (not shown) formed on the bus electrodes 21 a and 22 a . Since two adjacent display lines share one of the X and Y electrodes and, the respective X and Y electrodes participate in sustain-discharging discharge cells 23 that are placed on both sides thereof.
  • a plurality of scan circuits are respectively coupled to the plurality of scan lines, i.e., the Y electrodes Y 1 to Y n , and are formed in the scan electrode driver 400 .
  • a scan voltage (VscL in FIG. 3A ) and a non-scan voltage (VscH in FIG. 3A ) are selectively applied to the Y electrodes Y 1 to Y n by the scan circuits.
  • FIG. 3A to FIG. 3C , FIG. 4 , and FIG. 5A to FIG. 5F A driving method of the plasma display device according to the exemplary embodiment of the present invention will now be described with reference to FIG. 3A to FIG. 3C , FIG. 4 , and FIG. 5A to FIG. 5F .
  • FIG. 3A to FIG. 3C respectively show diagrams representing driving waveforms of the plasma display device according to first to third exemplary embodiments of the present invention
  • FIG. 4 shows a diagram representing discharge cell states at neighboring display lines
  • FIG. 5A to FIG. 5F respectively show diagrams representing wall charge states on the respective electrodes for respective periods.
  • FIG. 3A to FIG. 3C driving waveforms applied to two adjacent discharge cells C( 2 i ⁇ 1, j) and C( 2 i, j) defined by first and second display lines L (2i ⁇ 1) and L 2i sharing one scan line (i.e., Y electrode Y i ) and one address line (i.e., A electrode A j ) as shown in FIG. 4 will be described. That is, the discharge cell C( 2 i ⁇ 1, j) is defined by the X electrode X i and the Y electrode Y i , forming the first display line L 2i ⁇ 1 and the A electrode A j .
  • discharge cell C( 2 i, j) is defined by the X electrode X i+1 and the Y electrode Y i , forming the second display line L 2i and the A electrode A j ,
  • ‘i’ is an odd number (1, 3, 5, . . . ).
  • an address period in a subfield includes a first period, a second period, and a wall charge compensation period provided between the first period and the second period.
  • the discharge cell C( 2 i ⁇ 1, j) is selected as a turn-on cell among the two discharge cells C( 2 i ⁇ 1, j) and C( 2 i, j) as shown in FIG. 4A
  • an address discharge is generated during the first period.
  • the discharge cell C( 2 i, j) is selected as a turn-on cell among the two discharge cells C( 2 i ⁇ 1, j) and C( 2 i, j) as shown in FIG. 4B
  • the address discharge is generated during the second period.
  • the address discharges are generated during the first and second periods.
  • a voltage at the Y electrode Y i gradually increases from a Vs voltage to a Vset voltage while the reference voltage is applied to the first and second groups X i and X i+1 of the X electrodes.
  • the reference voltage may be a ground voltage (0V) as shown in FIG. 3A .
  • the voltage at the Y electrode may increase in a ramp pattern as shown in FIG. 3A .
  • the ( ⁇ ) wall charges are formed on the Y electrode Y i
  • the (+) wall charges are formed on the X electrodes X i and X i+1
  • the A electrode A j since weak discharges are generated 1) between the Y electrode Y i and the X electrodes X i and X i+1 , and 2) between the Y electrode Y i and A electrode A j while the voltage at the Y electrode Y 1 increases.
  • the voltage at the Y electrode Y i gradually decreases from the Vs voltage to a Vnf voltage. Then, the weak discharges are generated 1) between the Y electrode Y i and the X electrodes X i and X i+1 and 2) between the Y electrode Y i and the A electrode A j while the voltage at the Y electrode Y i decreases.
  • the ( ⁇ ) wall charges formed on the Y electrode Y i and the (+) wall charges formed on the X electrodes X i and X i+1 and the A electrode A j as shown in FIG. 5A are eliminated, and the discharge cell is initialized to be a turn-off cell.
  • a sum of 1) a wall voltage between the X electrode X i or X i+1 and the Y electrode Y i and 2) an external voltage of (Vnf ⁇ Ve) between the Y electrodes Y i and the X electrode X i or X i+1 is set to be a discharge firing voltage between the Y electrode Y i and the X electrode X i or X i+1 .
  • a sustain discharge error (misfiring) may be prevented in a turn-off cell on which the address discharge is not generated during the address period since the wall voltage between the Y electrode Y i and the X electrode X i or X i+1 reaches 0V.
  • a scan pulse having a scan voltage VscL is sequentially applied to the Y electrodes (Y 1 to Y n of FIG. 1 ).
  • the scan voltage VscL may be set to be substantially the same as or lower than the Vnf voltage.
  • An address voltage Va is applied to the A electrode A j passing the discharge cell C( 2 i ⁇ 1, j) that is to be selected among the discharge cells on the first display line L (2i ⁇ 1) formed by 1) the Y electrode Y i to which the scan voltage VscL is applied and 2) the first group X 1 .
  • a VscH voltage that is higher than the scan voltage VscL is applied to the other Y electrodes to which the scan voltage VscL is not applied, and the reference voltage is applied to the A electrode of the remaining discharge cells that are not selected.
  • the (+) wall charges are formed on a first portion of the Y electrode Y i (see “ 22 b 1 ” in FIG. 2 ) and the ( ⁇ ) wall charges are formed on the first group X i as shown in FIG. 5C .
  • the Y electrode Y i includes the first portion ( 22 b 1 ) and a second portion ( 22 b 2 ).
  • the first portion ( 22 b 1 ) of the Y electrode Y i is a portion which is above the bus electrode 22 a and closer to the first group electrodes X i
  • the second portion ( 22 b 2 ) of the Y electrode Y i is a portion which is below the bus electrode 22 a and closer to the second group electrodes X i+1 .
  • the address discharge is not generated on the discharge cell C( 2 i, j).
  • a weak discharge may be generated between the Y electrode Y i (i.e., the second portion ( 22 b 2 ) of the Y electrode Y i ) and the A electrode A 1 of the discharge cell C( 2 i, j) while the address discharge is generated on the discharge cell C( 2 i ⁇ 1, j) on the first display line L 2i ⁇ 1 during the first period. That is, the weak discharge may be generated in at least one discharge cell on the second display line, which shares the scan line and the address line with the discharge cell in which the address discharge is generated during the first period of the address period.
  • the intensity of the weak discharge is weaker than that of the sustain discharge. Then, since (+) wall charges and ( ⁇ ) wall charges have been respectively formed on the A electrode A j and the second portion 22 b 2 of the Y electrode Y i of the discharge cell C( 2 i, j) during the reset period as shown in FIG. 5A before the weak discharge is generated, a portion of the previously formed charges is partly eliminated by the weak discharge as shown in FIG. 5B .
  • the Vb 1 voltage which is higher than the voltage VscH
  • the Vb 2 voltage which is higher than the Vb 1 voltage
  • the Vb 2 voltage may be set to be higher than the voltage Vs.
  • the Vb 1 voltage may be set to be substantially the same as a voltage of (VscH ⁇ VscL) and the Vb 2 voltage may be set to be substantially the same as a voltage of (Vs+(VscH ⁇ VscL)) such that the Vb 1 and Vb 2 voltages can be supplied without additional power sources. Then, a sustain discharge is generated on the discharge cell C( 2 i ⁇ 1, j) having a wall charge state shown in FIG. 5C of the first display line L (2i ⁇ 1) formed by the Vb 2 voltage.
  • the (+) wall charges are formed on the first group X i of the X electrodes and the A electrode A j
  • the ( ⁇ ) wall charges are formed on the Y electrode Y i as shown in FIG. 5D
  • the weak discharge is generated on the discharge cell C( 2 i, j) of the second display line L 2i by the Vb 2 voltage and the wall voltage between the A electrode A j and the second portion ( 22 b 2 ) of the Y electrode Y i . Since the ( ⁇ ) wall charges have been formed on the second portion ( 22 b ) of the Y electrode Y i and the (+) wall charges have been formed on the A electrode A j as shown in FIG. 5B , the wall charge state of the discharge cell C( 2 i, j) on the second display line L 2i becomes equal to the wall charge state when the reset period ends as shown FIG. 5A by the weak discharge.
  • the Vs voltage is applied to the first group X i of the X electrodes, and the reference voltage is applied to the Y electrode Y i .
  • the (+) wall charges are formed on the first portion ( 22 b 1 ) of the Y electrode Y i
  • the ( ⁇ ) wall charges are formed on the first group X i of the X electrodes as shown in FIG. 5E .
  • the wall charge of the discharge cell C( 2 i, j) is still the same as the wall charge state when the reset period ends. Accordingly the wall charges partly eliminated from the A and Y electrodes of the discharge cell C( 2 i, j) on the second display line in the first period of the address period can be compensated during the wall charge compensation period.
  • the voltage Vb 2 may satisfy Equation 1 and Equation 2 in order to generate the weak discharge between the Y and A electrodes Y i and A j of the discharge cell C( 2 i, j) on the second display line L 2i.
  • Vw is a wall voltage between the A and Y electrodes of the discharge cell in a state shown in FIG. 5B
  • Vf AY is a discharge firing voltage between the A and Y electrodes.
  • VW is a wall voltage between the A and Y electrodes of the discharge cell in a state shown in FIG. 5A .
  • the Vb 2 voltage may be set to satisfy Equation 3.
  • a scan pulse having the scan voltage VscL is sequentially applied to the Y electrodes (Y 1 to Y n of FIG. 1 ).
  • the address voltage Va is applied to the A electrode A j passing the discharge cell C( 2 i, j) that is to be selected among the discharge cells on the second display line L 2i formed by the Y electrode Y i to which the scan voltage VscL is applied and the second group X i+1 of the X electrodes.
  • the address discharge is generated in the discharge cell C( 2 i, j) on a second display line L 2i .
  • the (+) wall charges are formed on the second portion ( 22 b 2 ) of the Y electrode Y i
  • the ( ⁇ ) wall charges are formed on the second group X i+1 of the X electrodes as shown in FIG. 5F . Since the wall charge state of the discharge cell C( 2 i ⁇ 1, j) on the first display line L 2i ⁇ 1 is as shown in FIG. 5E , the address discharge is not generated in the discharge cell ( 2 i ⁇ 1, j) during the second period of the address period.
  • sustain pulses alternately having a high level voltage (the Vs voltage in FIG. 3A ) or a low level voltage (0V in FIG. 3A ) are applied to the Y electrode Y i and the X electrodes X i and X i+1 with opposite polarity, and accordingly the sustain discharge is generated between the Y and X electrodes of the turn-on cells C( 2 i ⁇ 1, j) and C( 2 i, j).
  • These sustain pulse may be applied to all the Y electrodes (Y 1 to Y n of FIG. 1 ) and all the X electrodes (X 1 to X n of FIG. 1 ) with opposite polarity.
  • 0V is applied to the X electrodes X i and X i+1 , when the Vs voltage is applied to the Y electrode Y i
  • 0V is applied to the Y electrode Y i when the Vs voltage is applied to the X electrodes X i and X i+1
  • a discharge is generated between the Y electrode Y i and X electrodes X i and X i+1 , by the Vs voltage and the wall voltage formed between the Y electrode Y i and X electrodes X i and X i+1 by the address discharge during the first and second periods of the address period.
  • the sustain pulses are repeatedly applied to the Y electrode Y and X electrodes X i and X i+1 in proportion to the weight of a corresponding subfield.
  • the sustain discharge since the sustain discharge have been performed twice in the discharge cell C( 2 i ⁇ 1, j) on the first display line L 2i ⁇ 1 during the wall charge compensation period, the sustain discharge is additionally performed twice in the discharge cell C( 2 i, j) on the second display line L 2i during a second period of the sustain period so as to equalize the numbers of sustain discharges in the discharge cells C( 2 i ⁇ 1, j) and C( 2 i, j) on the first and second display lines L 2i ⁇ 1 and L 2i .
  • the discharge cell C( 2 i, j) on the second display line L 2i is sustain-discharged by applying the 0V to the second group X i+1 of the X electrodes and the Vs voltage to the Y electrode Y i and after the discharge cell C( 2 i, j) is sustain-discharged again by applying the Vs voltage to the second group X i+1 of the X electrodes and the 0V to the Y electrode Y i .
  • a voltage e.g., a voltage of (VscH ⁇ VscL)
  • VscH ⁇ VscL a voltage of (VscH ⁇ VscL)
  • the voltages applied to the first group of the X electrodes and the voltages applied to the second period of the X electrodes may be reversed to each other by a frame instead of performing the second period in the sustain period.
  • the discharge cell C( 2 i ⁇ 1, j) on the first display line L 2i ⁇ 1 is selected as the turn-on cell due to the Va voltage to applied to the A electrode A j and the VscL voltage applied to the Y electrode Y i during the first period of the address period, but the discharge cell C( 2 i, j) on the second display line L 2i is not selected as the turn-on cell during the second period of the address period because the reference voltage is applied to the A electrode A j when the VscL voltage is applied to the Y electrode Y j .
  • the address discharge and the sustain discharge are not generated during the address period and the sustain period. That is, the address discharge is generated during the first period of the address period in the discharge cell C( 2 i ⁇ 1, j) on the first display line L (2i ⁇ 1) .
  • the sustain discharge is generated in the discharge cell C( 2 i ⁇ 1, j) on the first display line L (2i ⁇ 1).
  • the discharge cell C( 2 i, j) on the second display line L 2j is selected as the turn-on cell due to the Va voltage applied to the A electrode A j and the VscL voltage applied to the Y electrode Y i during the second period of the address period, but the discharge cell C( 2 i ⁇ 1, j) on the first display line L 2i is not selected as the turn-on cell during the period of the address period because the reference voltage is applied to the A electrode A j when the VscL voltage is applied to the Y electrode Y j . Then, the address discharge is generated in the discharge cell C( 2 i, j) on the second display line L 2i during the second period of the address period.
  • the address discharge and the sustain discharge are not generated during the address period and the sustain period. Since the address discharge is not generated during the first period of the address period as described above, the wall charge states of the discharge cells C( 2 i ⁇ 1, j) and C( 2 i, j) are the same as the wall charge state when the reset period ends.
  • the driving waveforms in FIG. 3A to FIG. 3C may be applied to the PDP 100 shown in FIG. 6 .
  • FIG. 6 shows another exemplary embodiment of electrode arrangement diagram of the PDP 100 ′.
  • the respective display lines are defined by the respective Y and X electrodes as shown in FIG. 6 . That is, one X electrode may define one display line, which is located at the lower side of the X electrode, together with one Y electrode, and one Y electrode also may define one display line, which is located at the upper side of the Y electrode, together with one X electrode.
  • the plurality of Y electrodes Y 1 to Y 1 are divided into a first group including odd-numbered Y electrodes Y 1 , Y 3 , .
  • the second group may include the odd-numbered Y electrodes Y 1 , Y 3 , . . . , and Y (n ⁇ 1) and the first group may include the even-numbered Y electrodes Y 2 , Y 4 , . . . , and Y n .
  • One Y electrode (e.g., Y 1 ) of the first group and one Y electrode (e.g., Y 2 ) of the second group form one of the plurality of scan lines to which the scan pulse is sequentially applied during each of the first and second periods of the address period.
  • display lines L, to L (2n ⁇ 1) include a plurality of first display lines defined by the first group of the Y electrodes and the first group of the X electrodes, and a plurality of second display lines defined by the second group of the Y electrodes and the second group of the X electrodes. Therefore, each of the scan lines is shared by corresponding one of the first display lines and corresponding one of the second display lines.
  • barrier ribs 34 extending in the column direction may be formed between two adjacent A electrodes and the other portion of the barrier ribs 34 extending in the row direction may be formed between two adjacent display lines.
  • Each of the X electrodes X 1 to X 1 and each of the Y electrodes Y 1 to Y n respectively include bus electrodes 31 a and 32 a . In contrast to FIG. 2 , they include transparent electrodes 31 b and 32 b extending toward the corresponding discharge cells 33 from the bus electrodes 31 a and 32 a .
  • the X electrodes X 1 to X n and the Y electrodes Y 1 to Y n may be formed by only the bus electrodes 31 a and 32 a.
  • a scan line is shared by two display lines such that the number of scan circuits may be reduced.
  • the address period includes the first period for selecting the first discharge cell defined by the plurality of first display lines and the second period for selecting the plurality of second discharge cells defined by the plurality of second display lines, and the wall charge compensation period for compensating the wall charges of the plurality of second discharge cells is formed between the first period and the second period. Therefore, when the first discharge cell and the second discharge cell are selected as the turn-on cells, the address discharge may be stably performed.

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US20080218445A1 (en) * 2007-03-06 2008-09-11 Jeongmo Kim Plasma display device and driving method thereof
US20100315387A1 (en) * 2007-04-25 2010-12-16 Panasonic Corporation Plasma display device

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US6531994B1 (en) * 1999-11-18 2003-03-11 Mitsubishi Denki Kabushiki Kaisha Method of driving AC-type plasma display panel and plasma display device
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US20100315387A1 (en) * 2007-04-25 2010-12-16 Panasonic Corporation Plasma display device

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